• Professor of Mathematics
External address: 187 Physics Building, 120 Science Drive, West Campus, Durham, NC 27708-0320
Internal office address: 120 Science Drive, 117 Physics Building, Campus Box 90320, Durham, NC 27708-0320

### Research Areas and Keywords

##### Analysis

Geometric measure theory, especially regularity theory and singularities of calibrated currents. Nonlinear systems of elliptic PDEs. Analysis on noncompact complete spaces and on incomplete or singular spaces.

##### Geometry: Differential & Algebraic

Special and exceptional holonomy spaces, especially Calabi-Yau 3-folds, $G_2$ holonomy and $Spin_7$ metrics. Calibrated submanifolds and currents in special holonomy spaces: special Lagrangian, associative and coassociative and Cayley submanifolds. Singular calibrated currents especially calibrated cones. Einstein and Ricci-flat metrics.

##### Mathematical Physics

M-theory and its connection to $G_2$ holonomy spaces.

##### PDE & Dynamical Systems

Nonlinear systems of elliptic PDEs. Regularity theory of calibrated currents. Analysis on noncompact complete spaces and on incomplete or singular spaces.

My research concerns problems at the intersection between Differential Geometry and Partial Differential Equations, particularly special geometric structures that arise in the context of holonomy in Riemannian geometry. Currently I am particularly interested in special types of 7-dimensional spaces called G2-holonomy manifolds, or G2-manifolds for short. These spaces also arise naturally in modern theoretical physics in the 11-dimensional theory known as M theory. To get from 11 dimensions down to 4 dimensions it is necessary to 'compactify' on a 7-dimensional space and to preserve the maximal degree of (super)symmetry this 7-dimensional space should have G2-holonomy. In fact realistic 4-dimensional physics appears to demand singular G2-holonomy spaces and trying to construct compact singular G2-holonomy spaces is one of my current research projects.

Manifolds with special holonomy also come equipped with special submanifolds, called calibrated submanifolds, and special connections on auxiliary vector bundles, called generalised instantons. I am particuarly interested in associative and coassociative submanifolds in G2-holonomy spaces and special Lagrangian submanifolds in Calabi-Yau spaces. In the past I have also studied singular special Lagrangian n-folds.

I am currently the Deputy Director of the Simons Collaboration Special Holonomy in Geometry, Analysis, and Physics. My colleague here at Duke, Robert Bryant, is the Collaboration Director.

##### Education & Training
• Ph.D., University of Texas at Austin 2000

### Selected Grants

Special Holonomy in Geometry, Analysis, and Physics awarded by Simons Foundation (Principal Investigator). 2016 to 2020

Foscolo, L., and M. Haskins. “New G2-holonomy cones and exotic nearly Kahler structures on S6 and S3 x S3.” Annals of Mathematics, vol. 185, no. 1, Jan. 2017, pp. 59–130. Scopus, doi:10.4007/annals.2017.185.1.2. Full Text Open Access Copy

Corti, A., et al. “G2-Manifolds and associative submanifolds via semi-fano 3-folds.” Duke Mathematical Journal, vol. 164, no. 10, Jan. 2015, pp. 1971–2092. Scopus, doi:10.1215/00127094-3120743. Full Text

Mark, H., et al. “Asymptotically cylindrical Calabi-Yau manifolds.” Journal of Differential Geometry, vol. 101, no. 2, Jan. 2015, pp. 213–65. Open Access Copy

Corti, A., et al. “Asymptotically cylindrical Calabi-Yau 3-folds from weak Fano 3-folds.” Geometry and Topology, vol. 17, no. 4, July 2013, pp. 1955–2059. Scopus, doi:10.2140/gt.2013.17.1955. Full Text

Haskins, M., and N. Kapouleas. “The geometry of SO(p) × SO(q)-invariant special Lagrangian cones.” Communications in Analysis and Geometry, vol. 21, no. 1, Apr. 2013, pp. 171–205.

Haskins, M., and N. Kapouleas. “Closed twisted products and SO(p) × SO(q)-invariant special Lagrangian cones.” Communications in Analysis and Geometry, vol. 20, no. 1, Jan. 2012, pp. 95–162. Scopus, doi:10.4310/CAG.2012.v20.n1.a4. Full Text

Haskins, M., and N. Kapouleas. “Special Lagrangian cones with higher genus links.” Inventiones Mathematicae, vol. 167, no. 2, Feb. 2007, pp. 223–94. Scopus, doi:10.1007/s00222-006-0010-5. Full Text

Haskins, M., and T. Pacini. “Obstructions to special Lagrangian desingularizations and the Lagrangian prescribed boundary problem.” Geometry and Topology, vol. 10, Oct. 2006, pp. 1453–521. Scopus, doi:10.2140/gt.2006.10.1453. Full Text

Haskins, M. “Special Lagrangian cones.” American Journal of Mathematics, vol. 126, no. 4, Aug. 2004, pp. 845–71.

Haskins, M. “The geometric complexity of special Lagrangian T2-cones.” Inventiones Mathematicae, vol. 157, no. 1, July 2004, pp. 11–70. Scopus, doi:10.1007/s00222-003-0348-x. Full Text